Quick Answer
Quick Answer
IS 1161 is the Bureau of Indian Standards specification for steel tubes used in structural applications. It covers three grades: YSt 210, YSt 240, and YSt 310. BIS certification is mandatory for IS 1161 tubes sold in India.
IS 1161 (IS 1161:2014 with amendments) is published by the Bureau of Indian Standards (BIS) and governs welded and seamless circular steel tubes used for structural purposes.
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